<Observation xmlns="http://hl7.org/fhir">
    <id value="Pathology-Observation-Lymphocyte-Example" />
    <meta>
        <profile value="https://fhir.hl7.org.uk/StructureDefinition/UKCore-Observation-Lab" />
    </meta>
    <identifier>
        <system value="https://tools.ietf.org/html/rfc4122" />
        <value value="2af46949-4938-4c57-bad4-c4363e1965d5" />
    </identifier>
    <status value="final" />
    <category>
        <coding>
            <system value="http://terminology.hl7.org/CodeSystem/observation-category" />
            <code value="laboratory" />
            <display value="Laboratory" />
        </coding>
    </category>
    <code>
        <!--  Equivalent codes from the PBCL and PaLM SNOMED CT reference sets are used in this example.  -->
        <!--  In practice, it is likely that only a code from one reference set will be carried.  -->
        <coding>
            <!--  From PBCL observable entity reference set  -->
            <system value="http://snomed.info/sct" />
            <code value="1022581000000105" />
            <display value="Lymphocyte count" />
        </coding>
        <coding>
            <!--  From PaLM observable entity reference set  -->
            <system value="http://snomed.info/sct" />
            <code value="67541000237108" />
            <display value="Lymphocyte count in blood" />
        </coding>
    </code>
    <subject>
        <reference value="urn:uuid:ab87a3f8-1d37-44a9-804e-5e962598a6e4" />
        <display value="MOXEY, Judy" />
    </subject>
    <issued value="2022-02-09T11:17:00+00:00" />
    <performer>
        <reference value="urn:uuid:8a6d85b8-9837-4fed-a257-4cf207988338" />
        <display value="TD008362 PATH LAB 001" />
    </performer>
    <valueQuantity>
        <value value="0.70" />
        <unit value="10*9/L" />
        <system value="http://unitsofmeasure.org" />
        <code value="10^9/L" />
    </valueQuantity>
    <interpretation>
        <coding>
            <system value="http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation" />
            <code value="L" />
            <display value="Low" />
        </coding>
    </interpretation>
    <specimen>
        <reference value="urn:uuid:bab0eaec-1ec5-4598-b660-90bb38a1030d" />
    </specimen>
    <referenceRange>
        <low>
            <value value="1.00" />
            <unit value="10*9/L" />
            <system value="http://unitsofmeasure.org" />
            <code value="10^9/L" />
        </low>
        <high>
            <value value="3.00" />
            <unit value="10*9/L" />
            <system value="http://unitsofmeasure.org" />
            <code value="10^9/L" />
        </high>
    </referenceRange>
</Observation>

{
    "resourceType": "Observation",
    "id": "Pathology-Observation-Lymphocyte-Example",
    "meta": {
        "profile":  [
            "https://fhir.hl7.org.uk/StructureDefinition/UKCore-Observation-Lab"
        ]
    },
    "identifier":  [
        {
            "system": "https://tools.ietf.org/html/rfc4122",
            "value": "2af46949-4938-4c57-bad4-c4363e1965d5"
        }
    ],
    "status": "final",
    "category":  [
        {
            "coding":  [
                {
                    "system": "http://terminology.hl7.org/CodeSystem/observation-category",
                    "code": "laboratory",
                    "display": "Laboratory"
                }
            ]
        }
    ],
    "code": {
        "coding":  [
            {
                "system": "http://snomed.info/sct",
                "code": "1022581000000105",
                "display": "Lymphocyte count"
            },
            {
                "system": "http://snomed.info/sct",
                "code": "67541000237108",
                "display": "Lymphocyte count in blood"
            }
        ]
    },
    "subject": {
        "reference": "urn:uuid:ab87a3f8-1d37-44a9-804e-5e962598a6e4",
        "display": "MOXEY, Judy"
    },
    "issued": "2022-02-09T11:17:00+00:00",
    "performer":  [
        {
            "reference": "urn:uuid:8a6d85b8-9837-4fed-a257-4cf207988338",
            "display": "TD008362 PATH LAB 001"
        }
    ],
    "valueQuantity": {
        "value": 0.70,
        "unit": "10*9/L",
        "system": "http://unitsofmeasure.org",
        "code": "10^9/L"
    },
    "interpretation":  [
        {
            "coding":  [
                {
                    "system": "http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation",
                    "code": "L",
                    "display": "Low"
                }
            ]
        }
    ],
    "specimen": {
        "reference": "urn:uuid:bab0eaec-1ec5-4598-b660-90bb38a1030d"
    },
    "referenceRange":  [
        {
            "low": {
                "value": 1.00,
                "unit": "10*9/L",
                "system": "http://unitsofmeasure.org",
                "code": "10^9/L"
            },
            "high": {
                "value": 3.00,
                "unit": "10*9/L",
                "system": "http://unitsofmeasure.org",
                "code": "10^9/L"
            }
        }
    ]
}